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Goodwill and Other Intangible Assets - Changes in Carrying Value of Goodwill (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Jun. 30, 2013
Goodwill [Roll Forward]      
Gross Goodwill, Beginning Balance $ 9,441us-gaap_GoodwillGross $ 9,434us-gaap_GoodwillGross  
Additions 13us-gaap_GoodwillAcquiredDuringPeriod 22us-gaap_GoodwillAcquiredDuringPeriod  
Goodwill, Written off Related to Sale of Business Unit   (15)us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit [1]  
Transfers 0us-gaap_GoodwillTransfers [2] 0us-gaap_GoodwillTransfers [3]  
Gross Goodwill, Ending Balance 9,454us-gaap_GoodwillGross 9,441us-gaap_GoodwillGross  
Accumulated Impairment, Beginning Balance (6,378)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss (6,274)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss  
Impairment of goodwill (710)us-gaap_GoodwillImpairmentLoss [4] (104)us-gaap_GoodwillImpairmentLoss  
Accumulated Impairment, Transfers 0czr_GoodwillAccumulatedImpairmentTransfers [2]    
Accumulated Impairment, Ending Balance (7,088)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss (6,378)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss  
Goodwill, Net Carrying Value 2,366us-gaap_Goodwill 3,063us-gaap_Goodwill  
Baluma S.A. [Member] | Conrad Punta Del Este Resort and Casino [Member]      
Goodwill [Roll Forward]      
Dispositions, Percentage of Voting Interests Sold     45.00%czr_DispositionsPercentageofVotingInterestsSold
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= czr_ConradPuntaDelEsteResortandCasinoMember
/ dei_LegalEntityAxis
= czr_BalumaS.A.Member
Caesars Entertainment Operating Company [Member]      
Goodwill [Roll Forward]      
Gross Goodwill, Beginning Balance 5,435us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		 5,475us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		  
Additions 0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		 0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		  
Goodwill, Written off Related to Sale of Business Unit   (15)us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		 [1]  
Transfers (1,141)us-gaap_GoodwillTransfers
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		 [2] (25)us-gaap_GoodwillTransfers
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		 [3]  
Gross Goodwill, Ending Balance 4,294us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		 5,435us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		  
Accumulated Impairment, Beginning Balance (4,175)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		 (4,071)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		  
Impairment of goodwill (251)us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		 [4] (104)us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		  
Accumulated Impairment, Transfers 805czr_GoodwillAccumulatedImpairmentTransfers
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		 [2]    
Accumulated Impairment, Ending Balance (3,621)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		 (4,175)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		  
Goodwill, Net Carrying Value 673us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		 1,260us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentOperatingCompanyMember		  
Caesars Entertainment Resort Properties [Member]      
Goodwill [Roll Forward]      
Gross Goodwill, Beginning Balance 3,894us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		 3,894us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		  
Additions 0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		 0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		  
Goodwill, Written off Related to Sale of Business Unit   0us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		 [1]  
Transfers 0us-gaap_GoodwillTransfers
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		 [2] 0us-gaap_GoodwillTransfers
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		 [3]  
Gross Goodwill, Ending Balance 3,894us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		 3,894us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		  
Accumulated Impairment, Beginning Balance (2,203)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		 (2,203)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		  
Impairment of goodwill (289)us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		 [4] 0us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		  
Accumulated Impairment, Transfers 0czr_GoodwillAccumulatedImpairmentTransfers
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		 [2]    
Accumulated Impairment, Ending Balance (2,492)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		 (2,203)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		  
Goodwill, Net Carrying Value 1,402us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		 1,691us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsEntertainmentResortPropertiesMember		  
Caesars Growth Partners, LLC [Member]      
Goodwill [Roll Forward]      
Gross Goodwill, Beginning Balance 25us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		 0us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		  
Additions 0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		 0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		  
Goodwill, Written off Related to Sale of Business Unit   0us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		 [1]  
Transfers 1,141us-gaap_GoodwillTransfers
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		 [2] 25us-gaap_GoodwillTransfers
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		 [3]  
Gross Goodwill, Ending Balance 1,166us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		 25us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		  
Accumulated Impairment, Beginning Balance 0us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		 0us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		  
Impairment of goodwill (155)us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		 [4] 0us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		  
Accumulated Impairment, Transfers (805)czr_GoodwillAccumulatedImpairmentTransfers
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		 [2]    
Accumulated Impairment, Ending Balance (960)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		 0us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		  
Goodwill, Net Carrying Value 206us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		 25us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsGrowthPartnersLlcMember		  
Caesars Interactive Entertainment [Member]      
Goodwill [Roll Forward]      
Gross Goodwill, Beginning Balance 87us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		 65us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		  
Additions 13us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		 22us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		  
Goodwill, Written off Related to Sale of Business Unit   0us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		 [1]  
Transfers 0us-gaap_GoodwillTransfers
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		 [2] 0us-gaap_GoodwillTransfers
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		 [3]  
Gross Goodwill, Ending Balance 100us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		 87us-gaap_GoodwillGross
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		  
Accumulated Impairment, Beginning Balance 0us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		 0us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		  
Impairment of goodwill (15)us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		 [4] 0us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		  
Accumulated Impairment, Transfers 0czr_GoodwillAccumulatedImpairmentTransfers
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		 [2]    
Accumulated Impairment, Ending Balance (15)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		 0us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		  
Goodwill, Net Carrying Value $ 85us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		 $ 87us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= czr_CaesarsInteractiveEntertainmentMember		  
[1] During 2013, CEOC sold 45% of its interest in Baluma S.A. (See Note 6, “Acquisitions, Dispositions, and Other Property Matters.
[2] During 2014, CGP LLC purchased four properties from CEOC (see Note 2, “Basis of Presentation and Principles of Consolidation”).
[3] During 2013, CGP LLC purchased Planet Hollywood Hotel & Casino from CEOC (see Note 2, “Basis of Presentation and Principles of Consolidation”).
[4] CIE impairment during 2014 related to CIE RMG BEL, LLC is included in discontinued operations. (See Note 6, “Acquisitions, Dispositions, and Other Property Matters.”)